* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    background: repeating-linear-gradient(135deg,
            #89c1e6,
            #89c1e6 25px,
            #8abfe5 25px,
            #8abfe5 100px);
}

.container {
    position: relative;
    width: 350px;
    height: 504px;
    box-shadow: 0 0 5px #a0d3fa,
        0 0 10px #5573a9;
    backdrop-filter: blur(3px);
    background: url(cbg.jpg) center no-repeat fixed;
    background-size: 350px 504px;
}

.mark {
    font-family: 'fangsong';
    position: absolute;
    height: 50px;
    width: 150px;
    bottom: 50px;
    right: -150px;
    text-align: center;
    color: rgb(29, 66, 251);
    font-weight: 700;
    line-height: 50px;
    font-size: 25px;
    user-select: none;
}

.again {
    font-family: 'fangsong';
    position: absolute;
    height: 30px;
    width: 100px;
    right: -125px;
    bottom: 10px;
    line-height: 30px;
    text-align: center;
    box-shadow: inset 0 0 10px white;
    color: rgb(255, 255, 255);
    cursor: pointer;
    border-radius: 5px;
    user-select: none;
}

.again:hover {
    background-color: rgb(21, 168, 29);
}

.kuai {
    position: absolute;
    width: 28px;
    height: 28px;
    /* border: 0.1px solid rgb(0, 0, 0); */
}

.ding {
    position: absolute;
    width: 28px;
    height: 28px;
}

video {
    position: fixed;
    width: 100%;
    height: 100%;
    object-fit: cover;
    z-index: -10;
}

h1 {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 100px;
    font-family: 'fangsong';
    color: rgb(1, 175, 255);
    text-shadow: 0 0 10px rgb(1, 175, 255),
        0 0 15px rgb(1, 175, 255),
        0 0 20px rgb(1, 175, 255);
}